File Download
 
Links for fulltext
(May Require Subscription)
 
Supplementary

Article: Age and geochemistry of contrasting peridotite types in the Dabie UHP belt, eastern China: Petrogenetic and geodynamic implications
  • Basic View
  • Metadata View
  • XML View
TitleAge and geochemistry of contrasting peridotite types in the Dabie UHP belt, eastern China: Petrogenetic and geodynamic implications
 
AuthorsZheng, JP3 1 2
Sun, M2
Griffin, WL3
Zhou, MF2
Zhao, GC2
Robinson, P2 4
Tang, HY1
Zhang, ZH1
 
KeywordsAge dating
Dabie UHP terrane
Geochemistry
North China mantle wedge
Peridotite PGE
Yangtze Neoproterozoic intrusion
Zircon Hf isotope
 
Issue Date2008
 
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/chemgeo
 
CitationChemical Geology, 2008, v. 247 n. 1-2, p. 282-304 [How to Cite?]
DOI: http://dx.doi.org/10.1016/j.chemgeo.2007.10.023
 
AbstractThe Dabie ultrahigh-pressure (UHP) metamorphic belt, central China, contains two contrasting types of ultramafic-mafic complex. The Bixiling peridotite in the southern Dabie terrane contains abundant garnet (21-32 vol.%) and thus has high CaO +Al 2O 3 (9.94-15.3 wt.%). The peridotite also has high REE contents with flat REE patterns, high contents of S and other incompatible trace elements, together with low-Mg # olivine and pyroxene and low Ni and PGE contents. Zircons from this peridotite mostly have low Th/U ratios, interpreted to reflect a metamorphic origin, and give dominantly Triassic ages (ca. 210 Ma). Other zircons with high Th/U ratios give upper intercept ages of 745 Ma. Most zircons have positive e{open} Hf (+- 3.6 ∼ +- 8.1) values with depleted-mantle model ages (T DM) of 0.6-1.0 Ga (mean 0.8 Ga) and crustal model ages (T crust) of 0.8-1.4 Ga (mean 1.1 Ga). We interpret that the Bixiling complex was formed as cumulates in a Neoproterozoic asthenosphere-derived magma chamber in the continental crust, and was later carried to garnet-stable depths (ca. ∼ 4.4 GPa) during the subduction of the Yangtze Craton in the Triassic. In contrast, the Raobazhai peridotite in the northern Dabie terrane was metamorphosed at lower P/T conditions (i.e. 15 Kb and 1000 °C). All zircon grains from the peridotite yield Triassic ages (ca. 212 Ma) and have negative e{open} Hf values (- 16.6 ∼ - 3.2), Mesoproterozoic model ages (T DM = 1.0-1.5 Ga) and Paleoproterozoic crustal model ages (T crust = 1.5-2.3 Ga). The peridotite is enriched in LREE ((La/Yb) n ≈ 3.5), has high-Mg # olivine and pyroxene, high Ni and PGEs but low Pd/Ir (mean 3.0). It represents a highly refractory residue of partial melting (up to 18%) of primitive mantle, and is similar to the cratonic mantle xenoliths in Phanerozoic igneous rocks from the eastern North China Craton (e.g. Mengyin and Hebi areas). Negative Ce, Eu and HFSE anomalies in the peridotites suggest that their protolith was derived from the shallow part of the mantle wedge (e.g. plagioclase-stable field) of the North China Craton, and was pulled to a deeper level (e.g. spinel-stable field) during the subduction of the Yangtze Craton. The mantle wedge, like peridotitic xenoliths in the Jurassic Xinyang diatremes at the southern edge of the North China Craton, was metasomatised by fluids/melts released from the subducted continental crust. The fragments of this modified mantle wedge were incorporated into the Yangtze crust during its subduction. © 2007 Elsevier B.V. All rights reserved.
 
ISSN0009-2541
2012 Impact Factor: 3.154
2012 SCImago Journal Rankings: 1.714
 
DOIhttp://dx.doi.org/10.1016/j.chemgeo.2007.10.023
 
ISI Accession Number IDWOS:000253114500018
 
ReferencesReferences in Scopus
 
DC FieldValue
dc.contributor.authorZheng, JP
 
dc.contributor.authorSun, M
 
dc.contributor.authorGriffin, WL
 
dc.contributor.authorZhou, MF
 
dc.contributor.authorZhao, GC
 
dc.contributor.authorRobinson, P
 
dc.contributor.authorTang, HY
 
dc.contributor.authorZhang, ZH
 
dc.date.accessioned2010-09-06T06:43:09Z
 
dc.date.available2010-09-06T06:43:09Z
 
dc.date.issued2008
 
dc.description.abstractThe Dabie ultrahigh-pressure (UHP) metamorphic belt, central China, contains two contrasting types of ultramafic-mafic complex. The Bixiling peridotite in the southern Dabie terrane contains abundant garnet (21-32 vol.%) and thus has high CaO +Al 2O 3 (9.94-15.3 wt.%). The peridotite also has high REE contents with flat REE patterns, high contents of S and other incompatible trace elements, together with low-Mg # olivine and pyroxene and low Ni and PGE contents. Zircons from this peridotite mostly have low Th/U ratios, interpreted to reflect a metamorphic origin, and give dominantly Triassic ages (ca. 210 Ma). Other zircons with high Th/U ratios give upper intercept ages of 745 Ma. Most zircons have positive e{open} Hf (+- 3.6 ∼ +- 8.1) values with depleted-mantle model ages (T DM) of 0.6-1.0 Ga (mean 0.8 Ga) and crustal model ages (T crust) of 0.8-1.4 Ga (mean 1.1 Ga). We interpret that the Bixiling complex was formed as cumulates in a Neoproterozoic asthenosphere-derived magma chamber in the continental crust, and was later carried to garnet-stable depths (ca. ∼ 4.4 GPa) during the subduction of the Yangtze Craton in the Triassic. In contrast, the Raobazhai peridotite in the northern Dabie terrane was metamorphosed at lower P/T conditions (i.e. 15 Kb and 1000 °C). All zircon grains from the peridotite yield Triassic ages (ca. 212 Ma) and have negative e{open} Hf values (- 16.6 ∼ - 3.2), Mesoproterozoic model ages (T DM = 1.0-1.5 Ga) and Paleoproterozoic crustal model ages (T crust = 1.5-2.3 Ga). The peridotite is enriched in LREE ((La/Yb) n ≈ 3.5), has high-Mg # olivine and pyroxene, high Ni and PGEs but low Pd/Ir (mean 3.0). It represents a highly refractory residue of partial melting (up to 18%) of primitive mantle, and is similar to the cratonic mantle xenoliths in Phanerozoic igneous rocks from the eastern North China Craton (e.g. Mengyin and Hebi areas). Negative Ce, Eu and HFSE anomalies in the peridotites suggest that their protolith was derived from the shallow part of the mantle wedge (e.g. plagioclase-stable field) of the North China Craton, and was pulled to a deeper level (e.g. spinel-stable field) during the subduction of the Yangtze Craton. The mantle wedge, like peridotitic xenoliths in the Jurassic Xinyang diatremes at the southern edge of the North China Craton, was metasomatised by fluids/melts released from the subducted continental crust. The fragments of this modified mantle wedge were incorporated into the Yangtze crust during its subduction. © 2007 Elsevier B.V. All rights reserved.
 
dc.description.natureLink_to_subscribed_fulltext
 
dc.identifier.citationChemical Geology, 2008, v. 247 n. 1-2, p. 282-304 [How to Cite?]
DOI: http://dx.doi.org/10.1016/j.chemgeo.2007.10.023
 
dc.identifier.doihttp://dx.doi.org/10.1016/j.chemgeo.2007.10.023
 
dc.identifier.epage304
 
dc.identifier.hkuros144279
 
dc.identifier.isiWOS:000253114500018
 
dc.identifier.issn0009-2541
2012 Impact Factor: 3.154
2012 SCImago Journal Rankings: 1.714
 
dc.identifier.issue1-2
 
dc.identifier.openurl
 
dc.identifier.scopuseid_2-s2.0-37549059571
 
dc.identifier.spage282
 
dc.identifier.urihttp://hdl.handle.net/10722/72578
 
dc.identifier.volume247
 
dc.languageeng
 
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/chemgeo
 
dc.publisher.placeNetherlands
 
dc.relation.ispartofChemical Geology
 
dc.relation.referencesReferences in Scopus
 
dc.rightsChemical Geology. Copyright © Elsevier BV.
 
dc.subjectAge dating
 
dc.subjectDabie UHP terrane
 
dc.subjectGeochemistry
 
dc.subjectNorth China mantle wedge
 
dc.subjectPeridotite PGE
 
dc.subjectYangtze Neoproterozoic intrusion
 
dc.subjectZircon Hf isotope
 
dc.titleAge and geochemistry of contrasting peridotite types in the Dabie UHP belt, eastern China: Petrogenetic and geodynamic implications
 
dc.typeArticle
 
<?xml encoding="utf-8" version="1.0"?>
<item><contributor.author>Zheng, JP</contributor.author>
<contributor.author>Sun, M</contributor.author>
<contributor.author>Griffin, WL</contributor.author>
<contributor.author>Zhou, MF</contributor.author>
<contributor.author>Zhao, GC</contributor.author>
<contributor.author>Robinson, P</contributor.author>
<contributor.author>Tang, HY</contributor.author>
<contributor.author>Zhang, ZH</contributor.author>
<date.accessioned>2010-09-06T06:43:09Z</date.accessioned>
<date.available>2010-09-06T06:43:09Z</date.available>
<date.issued>2008</date.issued>
<identifier.citation>Chemical Geology, 2008, v. 247 n. 1-2, p. 282-304</identifier.citation>
<identifier.issn>0009-2541</identifier.issn>
<identifier.uri>http://hdl.handle.net/10722/72578</identifier.uri>
<description.abstract>The Dabie ultrahigh-pressure (UHP) metamorphic belt, central China, contains two contrasting types of ultramafic-mafic complex. The Bixiling peridotite in the southern Dabie terrane contains abundant garnet (21-32&#160;vol.%) and thus has high CaO +Al 2O 3 (9.94-15.3&#160;wt.%). The peridotite also has high REE contents with flat REE patterns, high contents of S and other incompatible trace elements, together with low-Mg # olivine and pyroxene and low Ni and PGE contents. Zircons from this peridotite mostly have low Th/U ratios, interpreted to reflect a metamorphic origin, and give dominantly Triassic ages (ca. 210&#160;Ma). Other zircons with high Th/U ratios give upper intercept ages of 745&#160;Ma. Most zircons have positive e{open} Hf (+- 3.6 &#8764; +- 8.1) values with depleted-mantle model ages (T DM) of 0.6-1.0&#160;Ga (mean 0.8&#160;Ga) and crustal model ages (T crust) of 0.8-1.4&#160;Ga (mean 1.1&#160;Ga). We interpret that the Bixiling complex was formed as cumulates in a Neoproterozoic asthenosphere-derived magma chamber in the continental crust, and was later carried to garnet-stable depths (ca. &#8764; 4.4&#160;GPa) during the subduction of the Yangtze Craton in the Triassic. In contrast, the Raobazhai peridotite in the northern Dabie terrane was metamorphosed at lower P/T conditions (i.e. 15&#160;Kb and 1000&#160;&#176;C). All zircon grains from the peridotite yield Triassic ages (ca. 212&#160;Ma) and have negative e{open} Hf values (- 16.6 &#8764; - 3.2), Mesoproterozoic model ages (T DM = 1.0-1.5&#160;Ga) and Paleoproterozoic crustal model ages (T crust = 1.5-2.3&#160;Ga). The peridotite is enriched in LREE ((La/Yb) n &#8776; 3.5), has high-Mg # olivine and pyroxene, high Ni and PGEs but low Pd/Ir (mean 3.0). It represents a highly refractory residue of partial melting (up to 18%) of primitive mantle, and is similar to the cratonic mantle xenoliths in Phanerozoic igneous rocks from the eastern North China Craton (e.g. Mengyin and Hebi areas). Negative Ce, Eu and HFSE anomalies in the peridotites suggest that their protolith was derived from the shallow part of the mantle wedge (e.g. plagioclase-stable field) of the North China Craton, and was pulled to a deeper level (e.g. spinel-stable field) during the subduction of the Yangtze Craton. The mantle wedge, like peridotitic xenoliths in the Jurassic Xinyang diatremes at the southern edge of the North China Craton, was metasomatised by fluids/melts released from the subducted continental crust. The fragments of this modified mantle wedge were incorporated into the Yangtze crust during its subduction. &#169; 2007 Elsevier B.V. All rights reserved.</description.abstract>
<language>eng</language>
<publisher>Elsevier BV. The Journal&apos;s web site is located at http://www.elsevier.com/locate/chemgeo</publisher>
<relation.ispartof>Chemical Geology</relation.ispartof>
<rights>Chemical Geology. Copyright &#169; Elsevier BV.</rights>
<subject>Age dating</subject>
<subject>Dabie UHP terrane</subject>
<subject>Geochemistry</subject>
<subject>North China mantle wedge</subject>
<subject>Peridotite PGE</subject>
<subject>Yangtze Neoproterozoic intrusion</subject>
<subject>Zircon Hf isotope</subject>
<title>Age and geochemistry of contrasting peridotite types in the Dabie UHP belt, eastern China: Petrogenetic and geodynamic implications</title>
<type>Article</type>
<identifier.openurl>http://library.hku.hk:4550/resserv?sid=HKU:IR&amp;issn=0009-2541&amp;volume=247&amp;spage=282&#8211;304&amp;epage=&amp;date=2007&amp;atitle=Age+and+geochemistry+of+contrasting+peridotite+types+in+the+Dabie+UHP+belt,+eastern+China:+Petrogenetic+and+geodynamic+implications.+</identifier.openurl>
<description.nature>Link_to_subscribed_fulltext</description.nature>
<identifier.doi>10.1016/j.chemgeo.2007.10.023</identifier.doi>
<identifier.scopus>eid_2-s2.0-37549059571</identifier.scopus>
<identifier.hkuros>144279</identifier.hkuros>
<relation.references>http://www.scopus.com/mlt/select.url?eid=2-s2.0-37549059571&amp;selection=ref&amp;src=s&amp;origin=recordpage</relation.references>
<identifier.volume>247</identifier.volume>
<identifier.issue>1-2</identifier.issue>
<identifier.spage>282</identifier.spage>
<identifier.epage>304</identifier.epage>
<identifier.isi>WOS:000253114500018</identifier.isi>
<publisher.place>Netherlands</publisher.place>
</item>
Author Affiliations
  1. China University of Geosciences
  2. The University of Hong Kong
  3. Macquarie University
  4. Dalhousie University